Metadata. They would still know where you were, for how long, who you talk to, when and from where. Then they combine these info. ex: you call your pop and mom, théir fridge broke down, and you start receiving ads for fridges. Was Meta listening?? No: pop and mom hinted the fridge was down (Google search or other), Meta has established your family links a long time ago, and you usually visit them after a longer than usual conversation (as they have an issue and yuu go help). Here: you fridge’s ads.